多维TCM的编码符号同步方法

Synchronization Methods of Multidimensional TCM

针对多维TCM译码中的编码符号同步问题,提出了两种同步方法:累计度量和同步法、回溯初始状态比较同步法。其中累计度量和同步法适用于非完全透明的编码,而回溯初始状态比较同步法对完全透明的编码和非完全透明的编码都适用。它们都直接利用Viterbi译码器的中间结果,计算量少,简单有效。

To detect the coding synchronization of multidimensional TCM in the decoding part, two synchronization methods are proposed： the method of measurement accumulation,and method of original states of surviving paths.The former is suitable for no-fully transparent codes and the latter is suitable for both of the no-fully and fully transparent ones. They both use the mid-results of the viterbi decoder and have the advantages of less calculation,simpleness and stabilization.